Automatic oil-firing system



Aug. 24 1926'- v 1,597,139 A. J. ALLlNsoN -AUTOMATIC OIL FIRING SYSTEM Filed Nov, 14. 1921 zsheets-sheet 1 Aug. 24 1926.

' A. J, ALLINSON AUTOMATIC OIL FIRING SYSTEM 2 Sheets-Sheei 2 Filed Nov.

INVENTOR. /m

ITTRNEYL M lli Patented Aug. 24, 1926.

UNITED STATES ALFRED J'. ALLINSON, OF TRONA, CALIFORNIA.

AUTOMATIC OIL-FIRING SYSTEM.

Application led November 14, 1921.

My invention relates to automatic oil iring systems and has among its salient objects to provide an improved control for the oil and steam supply and for the regulation of the dampers; to provide means in connection therewith to maintain a constant uniform steam pressure in the boilers, a proper amount of air to the urnace,and a proper amount of steam to the burners for atomizingthe fuel oil so as vto secure as complete combustion of the fuel as possible.

I accomplish this by varying the pressure 'of the oil in the pipe line leading to the burner, and in order to insure an equal amount of oil to each burner, I provide a liXed orilice or a` restricted passageway in the pipe line leading to each burner. The oil pressure is maintained by an ordinary steam pump which is controlled by any suitable pump pressure governor, the pressure side `of which is connected to a main steam line from the boiler, or other connection which will give the boiler pressure at all times.

In order to insure the proper amount of steam to atomize the oil at the varying oil pressure, a special reducing valve is provided to maintain a fixed ratio of pressure between the steam to the burner and the oil pressure.

I control the damper by means of a cylinder which is connected directly to the oil pressure and connect the piston in the cylinder with suitable levers to the damper. I also use a series of weights in controlling the adjustments of the damper.

In order to explain my invention, I have illustrated the same in the accompanying two sheets of drawings, in which,-

Figure 1 is a general view of the invention as embodiedV in a complete system, the oil supply and the burner under the boiler being shown;

Figure 2 is a sectional view through the damper controlling means;

Figure 3 is a sectional view of a pipe line,

showing a restricted passageway therein for Y the oil; and i Figure 4 is a sectional view through a` special regulatingr valve which is connected with the oil pressure for controlling the steam supply to the oil burner for atomizing the oil.

Referring .now in detail to the drawings, I will describe my invention as embodied in asystem in which oil and steam areused for Serial No. 514,951.

generating steam. The oil is pumped `from a tank, 1, or other source of supply, by

4means a steampump,2through pipe 3, and

`a pipe, 12, leading to anoil control, 13, for

controlling the steam line, 14, to the steam pump, 2. A by-pass, 15, is provided from the main steam line 16, leading from the boiler and connected to 17. The by-pass is provided with a valve, 18. A steam pressure control, 19, is also connected to the main steam line, 16, and to the main line 14, with which the oil pressure control '13 is connected, whereby the steam pressure also controls the supply of steam to `the steam pump 2.

The oil supply pipe 6, also' extends to and is connected with the lower end of a cylinder, 20, in which is a piston, 21, the piston rod 22 of which is connected with a lever, 23, one end of which is pivotally anchored in a bracket24, and the other end of which is connected to a rod 25, the lower end of which is connected to a series of weights, 26, adapted to be successively lifted, as said rod 25 is raised by said piston-operated lever 23. The weights 26, are provided with recesses, 26, and the rod 25 is provided with a series of threaded discs or nuts 25, adjustable thereon, whereby to malte possible the successive lifting of the weights, 26, as will be clear from the drawings, Fig. 2.

The upper end of the weight rod 25, is connected with a link 27, the opposite end of which is connected to the pivot shaft 28 of a damper 29, in theflue'SO.

Leading from the main steam line 16, is a branch line 16, leading to and through the lower part of a special reducing valve 31, shown in large sectional view in Fig. 4. The upper portion of said special reducing valve 31, is connected to the oil line, 6, as at 6a, the oil pressure which operates in the cylinder 20, also operating in the special valve 31. This special reducing valve 31, comprises a valve body, 31, with two valve seats, 31h, formed therein, adapted to be closed by the valves 31, on a valve rod, 31d,

the upper end of which is connected with a disc, 31e, with a diaphragm, Blf, secured around its edges between the parts of the valve body, as shown in Fig. 4L. The steam passage through the valve body is through the inlet end, at 31g, the valve openings at 31", and out at 31h. A chamber Sli below the diaphragm 31f, communicates with the valve body chamber by means of openings, 31j, whereby steamv pressure therein tends to raise said diaphragm Blf and close the valves 31", as shown. In the upper part of the device is a diaphragm, 31k, on the upper end of the valve stem 31d, with a bearing disc 31m, whereby the oil pressure in the pipe 6a tends to depress the diaphragm and move the valve stem 31d and valves- 31c downwardly against the upward pressure of the steam in the valve body below. Thus the oil pressure on the upper diaphragm, which is larger, opposes the steam pressure on the smaller diaphragm below, in regulating the amount of steam passing through the device.

In the oil pipe line I place fixed orifice members, as 32, shown in section in Fig. 3, providing a restricted passageway in the yoil line through which the oil must be forced on its way to the burner 9. An oil strainer 33 is also mounted in the pipe line, as shown in Fig. 1. Thus I have provided means for automatically regulating the oil and steam supply to the burners under the boilers, together .with operative connections for automatically and in connection therewith controlling the damper in the flue. Orifice member-32 is also placed in the steam pipe 16a. Y

I will now describe the use and operation of my invention as here shown for illustrative purposes. The oil supply is pumped through the pipe line 6, so that the oil pressure is the same in the cylinder 20, in the upper part of the special reducing valve 31, in pipe line 8 leading from the head 7, through the strainer, 83, the orifice members 32, and to the burner. The oil pressure is also the same in the oil pressure governor 13, and the pulsator 11. The oil pressure thus also operates through the pressure governor 13 to control the steam supply to the pump through the line let. The line 15 is simply a by-pass which can be opened by the valve 18, when it is desired to repair the steam governor', 19, or the governor 13.

The steam pressure in the boiler is transmitted through the pipes 16 and 14, to the steam pump 2, and into the steam control 19. The pipe 15 is a by-pass for use in case anything gets wrong with the control mechanisms 19 and 13. Steam also passes through the pipe '16a to the special reducing valve 31, which automatically regulates the atomizing pressure of the steam to the burner 9. As the steam pressure in the boiler rises, the steam pump governor 19, cuts off the supply of steam to the pump, reducing the oil pressure and therefore reducing the fire. As the oil pressure increases, the piston 21 is raised` which operates to move the damper 29, also to lift one of the weights 26, and if the pressure continues to a sufficiency to lift another weight, 2G, the damper is opened further, thus increasing the draft in the flue. That is, a certain pressure is sufficient to lift one of the weights and open the damper a certain amount. An increased pressure of a certain amount operates to lift another weight and open the damper further and so on until the damper is fully opened. As the pressure in oil supply decreases the weights operate to close the damper. rIhe oil pressure and the steam pressure to burner, in the special regulatingvvalvel, oppose each other and thus maintain a certain ratio of pressure of oil and of steam to the burner. If the oil pressure is greater, it operates the member 31 to admit more steam to take care of the increased supply of oil, while `the oil pressure operates also to regulate the movement of the damper, making the system automatic and uniform. The amount of oil supplied to the burner 9 is also regulated by the fixed orifice members, for only a certain amount of oil can be forced through the orifice by a certain pressure.

I claim:

1. In combination with a furnace having a flue with a damper movably mounted therein and an oil burner for heating said furnace, of means for supplying oil under pressure to said burner,'means for supplyling steam to said burner with said oil, a regulating member connected with the oil and steam supply, said regulating member having a valve therein connected for controlling the steam supply passing therethrough, means in said regulating member whereby said oil pressure and said steam pressure are opposed to each other in moving said valve, and means operated by the oil pressure and operatively connected to said damper for moving the same as said oil pressure increases.

2. In combination with a furnace having a flue with a damper therein and an oil burner for heating said furnace, of means for supplying oil and steam under pressureV to said burner, a regulating member through which said oil and steam pressures operate in opposition to each other to automatically regulate the relative amounts of oil and steam passing to said burner, and means operated by the oil pressure and operatively connected with said damper for moving the same, whereby to automatically regulate the draft through said iue and the oil and steam supply relatively.V

3. In combination, a furnace, a Hue, a damper therein, an oil burner, means for supplying oil and steam together under pressure to said burner, a regulating member connected with the oil pressure and with the steam pressure, said member having a Valve for controlling the steam passageway7 through said member, said valve being connected to be operated in opposite directions by the oil pressure' and the steam pressure opposed to each other, means providing a reto said burner, and means operated by said l0 oil pressure for automatically moving said damper, for the purpose described.

Signed at Los Angeles, Los Angeles County, California, this 7th day of November,

ALFRED J. ALLINSON. 

